tp512cvt: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/tp512cvt - from package: simh

You may install the required package with command apt-get install {package}

Error in other languages:
tp512cvt: bevel nie gevind nie
tp512cvt: comandă negăsită
tp512cvt: comando não encontrado
tp512cvt: commande introuvable
tp512cvt: command not found
tp512cvt: käsku ei ole
tp512cvt: không tìm thấy lệnh
tp512cvt: komanda nerasta
tp512cvt: Kommando nicht gefunden.
tp512cvt: kommandot finns inte
tp512cvt: komut yok
tp512cvt: nie znaleziono polecenia
tp512cvt: níor aimsíodh an t-ordú
tp512cvt: no se encontró la orden
tp512cvt: no s'ha trobat l'ordre
tp512cvt: opdracht niet gevonden
tp512cvt: parancs nem található
tp512cvt: perintah tidak ditemukan
tp512cvt: príkaz nenájdený
tp512cvt: příkaz nenalezen
tp512cvt: команда не найдена
tp512cvt: командата не е открита
tp512cvt: 命令找不到
tp512cvt: コマンドが見つかりません